Lock



S. SEGAL June 17, 1930.

LOCK

Filed July 7, 1928 INVENTOR.

A ATTORNEYS.

Patented June 17, 1930 UNITED STATES PATENT OFFICE SAMUEL SEGAL, OF NEWYORK, N. Y., ASSIGNOR TO SEGAL LOOK & HAROWAIBE CO.,

INQ, OF NEW YORK, N. Y., A. CORPORATION OF NEW YORK LOCK Applicationfiled July 7, 1928. Serial No. 291,069.

This invention rel ates to a lock structure and specifically aims toprovide an improved mechanism of this character serving to prevent theactuation of the look by a non-authorized person.

It is well appreciated by those skilled in the art that considerabledifficulty has been experienced in connection with locks in that aburglar has quite often succeeded in actuating the lock mechanism bysimply ripping the cylinder or other exposed key structure from a doorand thereafter, by the use of a proper implement such as, for example, ascrew driver, actuating the crank of the lock mechanism to retract thebolt of the latter.

With this in mind the present invention has, as its primary object, theprovision of a novel and improved mechanism whereby the actuation of alock in this manner will be prevented.

A further object of the invention is that of providing a mechanism whichwill in no way interfere with the normal operation of the lock and whichmechanism, furthermore, will not interfere with the ready application ofthe lock to a door.

1 A still further object is that of furnishing a mechanism in which,when unauthorized operation is once attempted the parts will be thrownto a position at which they cannot be released by a person on theoutside of a door.

Another object is that of furnishing such a mechanism in which the partswill be few in number and individually simple and rugged inconstruction, these parts being readily assembled and applicable tolocks of any desired type and the operation of which Wlll at all timesbe positive.

With these and further objects in mind reference is had to the attachedsheet of drawings illustrating one practical embodiment of the inventionand in which:

Figure 1 is a somewhat ideal perspective view of one form of lockshowing the improved structure of the present invention associatedtherewith;

Fig. 2 is a perspective'view showing the mechanism afore referred to, infront position;

Fig. 3 is a face view with the parts in normal or retracted position,and

Figs. 4:, 5 and 6 illustrate the elements of the switch mechanism.

In these views the numeral 10 indicates a key cylinder from the plug 11of which a tail piece 12 extends rearwardly. In accordance with theconventional construction this cylinder is secured as, for example, bybolts 13 to a mounting plate 14 provided on the inner face of theclosure with which the lock is associated. The lock illustrated has beenshown as including a case 15 from which a bolt structure 16 extends, therear face of which case is closed by a cover plate 17 mounting a crank(not shown) which is secured to a rotatable plug 18 formed, in thepresent instance, with a slot for the reception of the end of the tailpiece.

At this time it is to be understood that all of the foregoing isillustrative and that in lieu of the key mechanism, tail piece and lockshown, any desired equivalent mechanisms might be employed and that themounting plate 14 might be dispensed with if it were desired to do so.Likewise, in connection with the structure hereinafter described, itwill be appreciated that according to the type of lock in connectionwith which the same is employed, various changes might be made andthat,'aside from changes incident to the employment of the invention inconnection with various types of lock, the structure of theimechanismmightbe varied in numerous particulars. 7

.Thus, the numeral 19 indicates a casing which, in the present instance,is formed with outwardly extending flange portipns 20 for reception bysuitable openings or depressions in the cover plate 17. This casing isformed withan opening 21 for the passage of the tail piece 12 andmounted within this casing is a bolt or plate 22 formed witha similaropening 23 capable of being registered with the opening 21. However, theparts tend to shift to a position at which the openings do not registeras, for example, by the use of a spring 24 having one of its endsmounted by the other end thereof, and in one of its extreme positions,as shownin Fig. 3, the openings 21-23 are in alignment,,while the spring24 tends to move the plate to the position shown inFig.2. v v With aview to dead-locking the plate in this latter position a tumbler or boltmay be employed which includes a body 26 having a raised portion 27 inone of its edges and a bearing portion 28 in its opposite edge, thelatter seating within a rounded" depresslon.

29 formed in the plate 22. 'A spring 3O carried by the latter bearsagainst the inner edge of the body 26 and serves to normally project theraised portion 27 into a depression or opening 31 formed in the 'case.It is obvious that when the parts are in this position the plate 22 maynot be forced rearwardly and this position of the parts will beautomatically established upon the plate being released and projected bythe spring 24. However, by simply pressing against the beveled end 32 ofthe tumbler or bolt, as, for example, by a pin 33, the former will beswung downwardly so that the projecting portion 27 will be retractedfrom within the opening or depression 31 and continued pressure willresult in they parts being bodily retracted to a point at which theopenings 21-23 align. v

In utilizing a device of this character it will be obvious that thecasing 19 is mounted, for example, upon the cover plate 17. Thereafter,the door is drilled in the usual manner and the mounting plate and thecylinder are applied thereto, conceding of course, that the former isemployed. The mechanic will the now simply mount the lock casing 15 uponthe door and at the time of the mounting will, by inserting the pin 33through the opening 34 in the lock case, retract-the tumbler andconsequentl the plate to the position shown in Fig. 3. hereafter, thelock may be completely applied, exercising the usual care to have thetail piece extend within the slot of plug18.

The lock will now function in the usual manner, but if anyone succeedsinforcing a key mechanism as, for example, the cylinder 10 from the door,it is obvious that such movement will result in a withdrawal of the tailpiece from within the slot of the plug and the openings 2321.Consequently, the plate will sna to its closed position in which it willbe retalned by the dead-lock structure and a burglar will now find thatthe plug is inaccessible even with the cylinder and the tail pieceripped clear of the door. As afore brought out, the plate may beretracted only from the inside of the door and thus the lockoperatingmechanism will continue inaccessible.

parting from the spirit of the invention asdefined by the claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent is I 1. In combination a bolt, means for moving thesame, a key mechanism, a connecting element between said mechanism andsaid bolt-moving means, means operating automatically and associatedwith said bolt-moving means to render the latter inaccessible upon saidconnecting element being detached therefrom and means for preventing asubsequent operation of said last named means.

2. In combination a bolt, means for moving the same, a key mechanism, aconnecting element between said mechanism. and said bolt moving means,means operating automatically and associated with said boltmoving meansto render the latter inaccessible upon said connecting element beingdetached therefrom and means for deadlocking said last named means.

3. In combination a bolt, means for moving the same, a key mechanism, aconnecting element between said mechanism and'said bolt-moving means,means operating automatically and associated with said bolt-moving meansto render the latter inaccessible cluding a casing, a plate movablewithin said casing, said plate and caslng being formed 1'- vwithopenings, means for normally urglng said plate'to a position at whichsaid openings will be non-aligned and means for automatically lockingsuch plate in said latter positiom 6. A device of the characterdescribed including a casing, a plate movable within said casing, saidplate and easing being formed with openings, means for normally urgingsaid plate-to a position at which said openin s will be non-aligned,means for automati ca ly locking such plate in said latter position andmeans whereby said last named means-may be released and said plate maybe moved to a position at which the openings ali v 7. A device of thecharacter described in cluding a casing formed with an Opening, a

plate also formed with an opening and mov able within. said casing, aspring carried by said plate and engaging said casing to urge said plateto a position at which the opening thereof does not align with saidcasing'open- I with anopening,

bodily shifting of the same,

and acting automatically upon of said actuating element to close thesecond ing, a bolt for deadlocking such plate in the latter position anda spring carried by said plate and engaging said bolt for normallyurging the same into locking position.

8. In combination a lock casing, a bolt associated therewith, a coverplate for said casing, means carried by said plate for actuand bodilyshifting said plate to a position at which the opening thereof alignswith said casing opening.

10. A device of the character described including, in combination, acasing, flange ortions forming a part of said casing, a p ate movablewithin said casing, said plate and easing being formed with openings,means tending normally to project said plate to bring said openings intonon-aligned condition, and means carried by said plate and 00'-operating with a portion of the flange of said casing to normallyprevent a return of said plate to a position in which said openings arealigned.

In testimony whereof I afiix my signature.

SAMUEL SEGAL.

cluding a casing formed with an opening, a 1

plate movable within said casing and also formed with an opening, a boltassociated with said plate and normally cooperating with said casing toprevent amovement of the plate, the end of said bolt being beveledwhereby ressure applied to such end surface will resu t in a retractionof said bolt and a together with said plate, to a point at which theopening of the latter aligns with the opening of said casing.

11. A device of the character described including, in combination, alock casing formed I a bolt, operating means within said casing forprojecting and retract I ing said bolt, a second casing secured to saidlock casing and being formed with an openmg 1n line with the first namedopening, an

actuating member extending through said I openings and connected 'tosaid operating means, and means within said secondcasihg the removalcasing opening and to render said operating means inaccessible.

2 12. A device of the character described in-

